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vsl-lex.C

// This file was modified for -*- C++ -*-
// using $RCSfile$ $Revision$

/* A lexical scanner generated by flex */

/* Scanner skeleton version:
 * $Header: /home/daffy/u0/vern/flex/RCS/flex.skl,v 2.91 96/09/10 16:58:48 vern Exp $
 */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5

#include <stdio.h>
#include <unistd.h>


/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */
#ifdef c_plusplus
#ifndef __cplusplus
#define __cplusplus
#endif
#endif


#ifdef __cplusplus

#include <stdlib.h>

/* Use prototypes in function declarations. */
#define YY_USE_PROTOS

/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST

#else /* ! __cplusplus */

#if __STDC__

#define YY_USE_PROTOS
#define YY_USE_CONST

#endif      /* __STDC__ */
#endif      /* ! __cplusplus */

#ifdef __TURBOC__
 #pragma warn -rch
 #pragma warn -use
#include <io.h>
#include <stdlib.h>
#define YY_USE_CONST
#define YY_USE_PROTOS
#endif

#ifdef YY_USE_CONST
#define vslconst const
#else
#define vslconst
#endif


#ifdef YY_USE_PROTOS
#define YY_PROTO(proto) proto
#else
#define YY_PROTO(proto) ()
#endif

/* Returned upon end-of-file. */
#define YY_NULL 0

/* Promotes a possibly negative, possibly signed char to an unsigned
 * integer for use as an array index.  If the signed char is negative,
 * we want to instead treat it as an 8-bit unsigned char, hence the
 * double cast.
 */
#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN vsl_start = 1 + 2 *

/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START ((vsl_start - 1) / 2)
#define YYSTATE YY_START

/* Action number for EOF rule of a given start state. */
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)

/* Special action meaning "start processing a new file". */
#define YY_NEW_FILE vslrestart( vslin )

#define YY_END_OF_BUFFER_CHAR 0

/* Size of default input buffer. */
#define YY_BUF_SIZE 16384

typedef struct vsl_buffer_state *YY_BUFFER_STATE;

// extern int vslleng;
// extern FILE *vslin, *vslout;

#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2

/* The funky do-while in the following #define is used to turn the definition
 * int a single C statement (which needs a semi-colon terminator).  This
 * avoids problems with code like:
 *
 *    if ( condition_holds )
 *          vslless( 5 );
 *    else
 *          do_something_else();
 *
 * Prior to using the do-while the compiler would get upset at the
 * "else" because it interpreted the "if" statement as being all
 * done when it reached the ';' after the vslless() call.
 */

/* Return all but the first 'n' matched characters back to the input stream. */

#define vslless(n) \
      do \
            { \
            /* Undo effects of setting up vsltext. */ \
            *vsl_cp = vsl_hold_char; \
            YY_RESTORE_YY_MORE_OFFSET \
            vsl_c_buf_p = vsl_cp = vsl_bp + n - YY_MORE_ADJ; \
            YY_DO_BEFORE_ACTION; /* set up vsltext again */ \
            } \
      while ( 0 )

#define unput(c) vslunput( c, vsltext_ptr )

/* The following is because we cannot portably get our hands on size_t
 * (without autoconf's help, which isn't available because we want
 * flex-generated scanners to compile on their own).
 */
typedef unsigned int vsl_size_t;


00147 struct vsl_buffer_state
      {
      FILE *vsl_input_file;

      char *vsl_ch_buf;       /* input buffer */
      char *vsl_buf_pos;            /* current position in input buffer */

      /* Size of input buffer in bytes, not including room for EOB
       * characters.
       */
      vsl_size_t vsl_buf_size;

      /* Number of characters read into vsl_ch_buf, not including EOB
       * characters.
       */
      int vsl_n_chars;

      /* Whether we "own" the buffer - i.e., we know we created it,
       * and can realloc() it to grow it, and should free() it to
       * delete it.
       */
      int vsl_is_our_buffer;

      /* Whether this is an "interactive" input source; if so, and
       * if we're using stdio for input, then we want to use getc()
       * instead of fread(), to make sure we stop fetching input after
       * each newline.
       */
      int vsl_is_interactive;

      /* Whether we're considered to be at the beginning of a line.
       * If so, '^' rules will be active on the next match, otherwise
       * not.
       */
      int vsl_at_bol;

      /* Whether to try to fill the input buffer when we reach the
       * end of it.
       */
      int vsl_fill_buffer;

      int vsl_buffer_status;
#define YY_BUFFER_NEW 0
#define YY_BUFFER_NORMAL 1
      /* When an EOF's been seen but there's still some text to process
       * then we mark the buffer as YY_EOF_PENDING, to indicate that we
       * shouldn't try reading from the input source any more.  We might
       * still have a bunch of tokens to match, though, because of
       * possible backing-up.
       *
       * When we actually see the EOF, we change the status to "new"
       * (via vslrestart()), so that the user can continue scanning by
       * just pointing vslin at a new input file.
       */
#define YY_BUFFER_EOF_PENDING 2
      };

static YY_BUFFER_STATE vsl_current_buffer = 0;

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 */
#define YY_CURRENT_BUFFER vsl_current_buffer


/* vsl_hold_char holds the character lost when vsltext is formed. */
static char vsl_hold_char;

static int vsl_n_chars;       /* number of characters read into vsl_ch_buf */


int vslleng;

/* Points to current character in buffer. */
static char *vsl_c_buf_p = (char *) 0;
static int vsl_init = 1;            /* whether we need to initialize */
static int vsl_start = 0;     /* start state number */

/* Flag which is used to allow vslwrap()'s to do buffer switches
 * instead of setting up a fresh vslin.  A bit of a hack ...
 */
static int vsl_did_buffer_switch_on_eof;

void vslrestart YY_PROTO(( FILE *input_file ));

void vsl_switch_to_buffer YY_PROTO(( YY_BUFFER_STATE new_buffer ));
void vsl_load_buffer_state YY_PROTO(( void ));
YY_BUFFER_STATE vsl_create_buffer YY_PROTO(( FILE *file, int size ));
void vsl_delete_buffer YY_PROTO(( YY_BUFFER_STATE b ));
void vsl_init_buffer YY_PROTO(( YY_BUFFER_STATE b, FILE *file ));
void vsl_flush_buffer YY_PROTO(( YY_BUFFER_STATE b ));
#define YY_FLUSH_BUFFER vsl_flush_buffer( vsl_current_buffer )

YY_BUFFER_STATE vsl_scan_buffer YY_PROTO(( char *base, vsl_size_t size ));
YY_BUFFER_STATE vsl_scan_string YY_PROTO(( vslconst char *vsl_str ));
YY_BUFFER_STATE vsl_scan_bytes YY_PROTO(( vslconst char *bytes, int len ));

static void *vsl_flex_alloc YY_PROTO(( vsl_size_t ));
static void *vsl_flex_realloc YY_PROTO(( void *, vsl_size_t ));
static void vsl_flex_free YY_PROTO(( void * ));

#define vsl_new_buffer vsl_create_buffer

#define vsl_set_interactive(is_interactive) \
      { \
      if ( ! vsl_current_buffer ) \
            vsl_current_buffer = vsl_create_buffer( vslin, YY_BUF_SIZE ); \
      vsl_current_buffer->vsl_is_interactive = is_interactive; \
      }

#define vsl_set_bol(at_bol) \
      { \
      if ( ! vsl_current_buffer ) \
            vsl_current_buffer = vsl_create_buffer( vslin, YY_BUF_SIZE ); \
      vsl_current_buffer->vsl_at_bol = at_bol; \
      }

#define YY_AT_BOL() (vsl_current_buffer->vsl_at_bol)

typedef unsigned char YY_CHAR;
FILE *vslin = (FILE *) 0, *vslout = (FILE *) 0;
typedef int vsl_state_type;
// extern char *vsltext;
#define vsltext_ptr vsltext

static vsl_state_type vsl_get_previous_state YY_PROTO(( void ));
static vsl_state_type vsl_try_NUL_trans YY_PROTO(( vsl_state_type current_state ));
static int vsl_get_next_buffer YY_PROTO(( void ));
static void vsl_fatal_error YY_PROTO(( vslconst char msg[] ));

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up vsltext.
 */
#define YY_DO_BEFORE_ACTION \
      vsltext_ptr = vsl_bp; \
      vslleng = (int) (vsl_cp - vsl_bp); \
      vsl_hold_char = *vsl_cp; \
      *vsl_cp = '\0'; \
      vsl_c_buf_p = vsl_cp;

#define YY_NUM_RULES 44
#define YY_END_OF_BUFFER 45
static vslconst short int vsl_accept[149] =
    {   0,
       41,   41,   45,   43,   41,   42,   43,   29,   43,   43,
       43,   40,   28,   37,   33,   35,   25,   31,   25,   25,
       25,   25,   25,   25,   25,   25,   25,   30,   32,   41,
       43,   41,    0,    1,    0,   26,    0,    3,    2,   40,
       27,   38,   34,   36,   25,   25,   25,   18,   14,   23,
       25,   25,   19,   25,   25,   41,    0,    0,    4,    0,
        0,    0,    0,    0,    0,    0,    1,    0,   39,    2,
       20,   25,   22,   21,   25,   25,    4,    0,    0,    0,
        0,    0,    0,   16,   25,   15,   25,    0,    0,    0,
        0,    0,    0,   17,   24,    0,    0,    0,    0,    0,

        0,    0,    7,    0,    0,    0,    9,    0,    7,    7,
        0,    0,    0,    0,    0,    0,    0,    0,    0,   10,
        0,    0,    0,    8,    0,    0,    0,    0,    5,    0,
        6,    0,    0,    0,    5,    6,    0,    0,    0,    0,
        0,   12,    0,    0,    0,   13,   11,    0
    } ;

static vslconst int vsl_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    2,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    4,    5,    6,    1,    1,    7,    1,    1,
        1,    8,    1,    1,    9,   10,   11,   12,   12,   12,
       12,   12,   12,   12,   12,   12,   12,   13,    1,   14,
       15,   16,    1,    1,   17,   17,   17,   17,   17,   17,
       17,   17,   17,   17,   17,   17,   17,   17,   17,   17,
       17,   17,   17,   17,   17,   17,   17,   17,   17,   17,
        1,   18,    1,   19,   17,    1,   20,   17,   21,   22,

       23,   24,   25,   26,   27,   17,   17,   28,   29,   30,
       31,   32,   17,   33,   34,   35,   36,   37,   38,   17,
       17,   17,    1,   39,    1,   40,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,

        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1
    } ;

static vslconst int vsl_meta[41] =
    {   0,
        1,    1,    2,    1,    1,    1,    1,    1,    1,    1,
        1,    3,    1,    1,    1,    1,    3,    1,    1,    3,
        3,    3,    3,    3,    3,    3,    3,    3,    3,    3,
        3,    3,    3,    3,    3,    3,    3,    3,    1,    1
    } ;

static vslconst short int vsl_base[159] =
    {   0,
        0,   39,  191,  192,  188,  192,   37,  192,  173,  178,
       35,  175,  173,   32,  192,  170,    0,  192,  154,  155,
      155,   20,  158,  149,  146,  152,  151,  192,  192,   47,
       54,  174,   46,  192,   47,  192,  165,  192,    0,  162,
      192,  192,  192,  192,    0,  151,  138,    0,    0,    0,
      136,  135,    0,  146,  145,   55,    0,  163,    0,  136,
      138,  127,  130,  139,  131,   49,   54,   55,  192,    0,
        0,   39,    0,    0,  130,  126,    0,  137,  127,  133,
      135,  122,  131,    0,  128,    0,  128,  122,  126,  115,
      122,  118,  122,    0,    0,  108,  141,  109,  112,  120,

      115,  116,  135,  109,  115,  113,  192,  110,    0,  130,
      109,   61,  106,   66,  103,   67,   86,   97,   87,  192,
       74,  109,   95,  192,   85,   73,   80,   96,    0,   83,
        0,   63,   67,   70,    0,    0,   58,   69,   60,   56,
       57,  192,   55,   52,   51,  192,  192,  192,  103,   67,
      106,  109,  112,  115,  118,  121,  124,  127
    } ;

static vslconst short int vsl_def[159] =
    {   0,
      148,    1,  148,  148,  148,  148,  149,  148,  148,  148,
      148,  148,  148,  148,  148,  148,  150,  148,  150,  150,
      150,  150,  150,  150,  150,  150,  150,  148,  148,  148,
      148,  148,  149,  148,  151,  148,  148,  148,  152,  148,
      148,  148,  148,  148,  150,  150,  150,  150,  150,  150,
      150,  150,  150,  150,  150,  148,   31,   31,  153,  148,
      148,  148,  148,  148,  148,  149,  149,  151,  148,  152,
      150,  150,  150,  150,  150,  150,  153,  148,  148,  148,
      148,  148,  148,  150,  150,  150,  150,  148,  148,  148,
      148,  148,  148,  150,  150,  148,  148,  148,  148,  148,

      148,  148,  154,  148,  148,  148,  148,  148,  154,  154,
      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  155,  156,  148,  148,  148,  148,  155,  157,  156,
      158,  148,  148,  148,  157,  158,  148,  148,  148,  148,
      148,  148,  148,  148,  148,  148,  148,    0,  148,  148,
      148,  148,  148,  148,  148,  148,  148,  148
    } ;

static vslconst short int vsl_nxt[233] =
    {   0,
        4,    5,    6,    4,    7,    4,    8,    4,    9,   10,
       11,   12,   13,   14,   15,   16,   17,    4,   18,   19,
       17,   17,   20,   21,   17,   17,   22,   23,   17,   24,
       25,   17,   17,   17,   26,   17,   17,   27,   28,   29,
       30,   34,   38,   49,   31,   39,   42,   43,   56,   50,
       34,   67,   57,   34,   35,   58,   56,   59,   34,   67,
       57,   84,  116,   35,   68,   85,   35,  121,  116,   45,
      122,   35,   68,  147,  146,  121,  145,  144,  122,  123,
       60,   61,  143,  142,   62,   63,   64,  123,  141,   65,
      140,  117,  139,  118,  138,  137,  119,  117,  131,  118,

      129,  134,  119,   33,  133,   33,   66,  132,   66,   70,
      131,   70,   77,  129,   77,  109,  127,  109,  128,  126,
      128,  130,  125,  130,  135,  124,  135,  136,  120,  136,
      115,  110,  114,  113,  112,  111,  110,  108,  107,  106,
      105,  104,  103,  102,  101,  100,   99,   98,   97,   96,
       95,   94,   93,   92,   91,   90,   89,   88,   87,   86,
       83,   82,   81,   80,   79,   78,  148,   76,   75,   74,
       73,   72,   71,   40,   69,   32,   55,   54,   53,   52,
       51,   48,   47,   46,   44,   41,   40,   37,   36,   32,
      148,    3,  148,  148,  148,  148,  148,  148,  148,  148,

      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  148
    } ;

static vslconst short int vsl_chk[233] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        2,    7,   11,   22,    2,   11,   14,   14,   30,   22,
       33,   35,   30,   66,    7,   31,   56,   31,   67,   68,
       56,   72,  112,   33,   35,   72,   66,  114,  116,  150,
      114,   67,   68,  145,  144,  121,  143,  141,  121,  114,
       31,   31,  140,  139,   31,   31,   31,  121,  138,   31,
      137,  112,  134,  112,  133,  132,  112,  116,  130,  116,

      128,  127,  116,  149,  126,  149,  151,  125,  151,  152,
      123,  152,  153,  122,  153,  154,  119,  154,  155,  118,
      155,  156,  117,  156,  157,  115,  157,  158,  113,  158,
      111,  110,  108,  106,  105,  104,  103,  102,  101,  100,
       99,   98,   97,   96,   93,   92,   91,   90,   89,   88,
       87,   85,   83,   82,   81,   80,   79,   78,   76,   75,
       65,   64,   63,   62,   61,   60,   58,   55,   54,   52,
       51,   47,   46,   40,   37,   32,   27,   26,   25,   24,
       23,   21,   20,   19,   16,   13,   12,   10,    9,    5,
        3,  148,  148,  148,  148,  148,  148,  148,  148,  148,

      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  148,  148,  148,  148,  148,  148,  148,  148,  148,
      148,  148
    } ;

static vsl_state_type vsl_last_accepting_state;
static char *vsl_last_accepting_cpos;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define vslmore() vslmore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
char *vsltext;
#line 1 "./vsl-lex.L"
#define INITIAL 0
/* $Id$ -*- C++ -*- */
/* VSL lexical analysis */
#line 5 "./vsl-lex.L"
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@gnu.org>.
// 
// This file is part of DDD.
// 
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
// 
// DDD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page, 
// `http://www.gnu.org/software/ddd/',
// or send a mail to the DDD developers <ddd@gnu.org>.

char VSL_lex_rcsid[] = 
    "$Id$";

// Define BAD_ISTREAM != 0, if istream::open() aborts upon
// non-existing file
#define BAD_ISTREAM 1

#include <stdio.h>
#include <errno.h>
#include "strclass.h"
#include "casts.h"

static const int max_include_nesting = 40;    // max include nesting

static std::istream *streamstack[max_include_nesting]; // File descriptors
static string     namestack[max_include_nesting];        // File names
static int  linestack[max_include_nesting];        // File lines
static int  topstack = 0;                    // Next free position

#ifdef FLEX_SCANNER
static YY_BUFFER_STATE bufstack[max_include_nesting]; // Buffer states
#endif

static std::istream *vslstream = &std::cin;

static int vsllinenumber;

static int switchdown(void);
//static int switchup(const char *filename, bool thisdir);

static char pushback[BUFSIZ];
static char *pushback_ptr = pushback;

static const char *searchpath(const char *filename, bool thisDir);

00528 class vslNameSet {
private:
    string _name;
    vslNameSet *_next;

public:
    vslNameSet(const char *name)
      : _name(name), _next(0)
    {}
    ~vslNameSet()    { reset(); }
    void reset();
    int add(const char *name);

private:
    vslNameSet(const vslNameSet&);
    vslNameSet& operator = (const vslNameSet&);
} vslnameSet("xyzzy");

inline int do_unput(char c) 
{
    if (c != '\0')
      *pushback_ptr++ = c;

    return c;
}

static int do_input(void) 
{
    if (pushback_ptr != pushback)
      return *--pushback_ptr;

    char c;

    vslstream->get(c);
    if (vslstream->eof())
      return 0;

    if (c == '\n')
      vsllinenumber++;
    return c;
}

// Switch to file FILENAME
static int switchup(const char *filename, bool thisdir) 
{
    if (!string(filename).empty())
    {
      // Search file
      filename = searchpath(filename, thisdir);

      // Add to name set; if we already have read it, don't care
      if (vslnameSet.add(filename))
          return 0;
    }

    if (topstack >= max_include_nesting)
    {
      VSLLib::parse_error("too many #include's");
      return -1;
    }

#ifdef FLEX_SCANNER
    if (YY_CURRENT_BUFFER == 0)
    {
      vslrestart(stdin);
    }

    bufstack[topstack]    = YY_CURRENT_BUFFER;
#endif

    streamstack[topstack] = vslstream;
    namestack[topstack]   = vslfilename;
    linestack[topstack]   = vsllinenumber;
    topstack++;

    vsllinenumber = 1;
    vslfilename = filename;

#ifdef FLEX_SCANNER
    vsl_switch_to_buffer(vsl_new_buffer(stdin, YY_BUF_SIZE));
#endif

    if (string(filename) == "")
    {
      vslstream   = &std::cin;
      vslfilename = "standard input";
    }
    else
    {
#if BAD_ISTREAM
    vslstream = 0;
    FILE *fp = fopen(filename, "r");
    if (fp == 0 || fclose(fp) == EOF) 
    {
#else
    vslstream = new ifstream(filename, ios::in);
    if (!vslstream->readable()) 
    {
#endif
      switchdown();
      VSLLib::parse_error(string(filename) + ": " + strerror(errno));
      return -1;
    }

#if BAD_ISTREAM
    // vslstream can now be opened
    vslstream = new std::ifstream(filename, std::ios::in);
#endif
    }

    if (VSEFlags::verbose)
    {
      std::cout << "(" << vslfilename;
      std::cout.flush();
    }

    return 0;
}

// The way SUN lex wants input
#ifdef input
#undef input
#define input do_input
#endif

#ifdef unput
#undef unput
#define unput do_unput
#endif

// The way FLEX wants input
#ifdef FLEX_SCANNER
#undef YY_INPUT
#define YY_INPUT(buf, result, max_size) \
{\
    int c = do_input(); \
    result = (c == '\0') ? YY_NULL : (buf[0] = c, 1); \
}
#endif

#undef vslwrap
#define YY_SKIP_YYWRAP
extern "C" int vslwrap(void) 
{ 
    if (switchdown())
      return 1;
    return vslstream->eof();
}


// Anything not in the list is a single character
#ifdef ECHO
#undef ECHO
#endif
#define ECHO                 return vsltext[0]


#ifdef FLEX_SCANNER
// #defining YY_BREAK to empty disables warnings about unreachable breaks.
#define YY_BREAK DO_NOT_BREAK
#define DO_NOT_BREAK
#define BREAK break;
#endif // FLEX_SCANNER

/* C Identifiers */
/* C Strings */
/* C Integers */
/* #include Strings */
/* Whitespace */
#line 695 "lex.vsl.c"

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int vslwrap YY_PROTO(( void ));
#else
extern int vslwrap YY_PROTO(( void ));
#endif
#endif

#ifndef YY_NO_UNPUT
static void vslunput YY_PROTO(( int c, char *buf_ptr ));
#endif

#ifndef vsltext_ptr
static void vsl_flex_strncpy YY_PROTO(( char *, vslconst char *, int ));
#endif

#ifdef YY_NEED_STRLEN
static int vsl_flex_strlen YY_PROTO(( vslconst char * ));
#endif

#ifndef YY_NO_INPUT
#ifdef __cplusplus
static int vslinput YY_PROTO(( void ));
#else
static int input YY_PROTO(( void ));
#endif
#endif

#if YY_STACK_USED
static int vsl_start_stack_ptr = 0;
static int vsl_start_stack_depth = 0;
static int *vsl_start_stack = 0;
#ifndef YY_NO_PUSH_STATE
static void vsl_push_state YY_PROTO(( int new_state ));
#endif
#ifndef YY_NO_POP_STATE
static void vsl_pop_state YY_PROTO(( void ));
#endif
#ifndef YY_NO_TOP_STATE
static int vsl_top_state YY_PROTO(( void ));
#endif

#else
#define YY_NO_PUSH_STATE 1
#define YY_NO_POP_STATE 1
#define YY_NO_TOP_STATE 1
#endif

#ifdef YY_MALLOC_DECL
YY_MALLOC_DECL
#else
#if __STDC__
#ifndef __cplusplus
#include <stdlib.h>
#endif
#else
/* Just try to get by without declaring the routines.  This will fail
 * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int)
 * or sizeof(void*) != sizeof(int).
 */
#endif
#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#define YY_READ_BUF_SIZE 8192
#endif

/* Copy whatever the last rule matched to the standard output. */

#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO (void) fwrite( vsltext, vslleng, 1, vslout )
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
      if ( vsl_current_buffer->vsl_is_interactive ) \
            { \
            int c = '*', n; \
            for ( n = 0; n < max_size && \
                       (c = getc( vslin )) != EOF && c != '\n'; ++n ) \
                  buf[n] = (char) c; \
            if ( c == '\n' ) \
                  buf[n++] = (char) c; \
            if ( c == EOF && ferror( vslin ) ) \
                  YY_FATAL_ERROR( "input in flex scanner failed" ); \
            result = n; \
            } \
      else if ( ((result = fread( buf, 1, max_size, vslin )) == 0) \
              && ferror( vslin ) ) \
            YY_FATAL_ERROR( "input in flex scanner failed" );
#endif

/* No semi-colon after return; correct usage is to write "vslterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef vslterminate
#define vslterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) vsl_fatal_error( msg )
#endif

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL int vsllex YY_PROTO(( void ))
#endif

/* Code executed at the beginning of each rule, after vsltext and vslleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK break;
#endif

#define YY_RULE_SETUP \
      if ( vslleng > 0 ) \
            vsl_current_buffer->vsl_at_bol = \
                        (vsltext[vslleng - 1] == '\n'); \
      YY_USER_ACTION

YY_DECL
      {
      register vsl_state_type vsl_current_state;
      register char *vsl_cp = NULL, *vsl_bp = NULL;
      register int vsl_act;

#line 247 "./vsl-lex.L"


#line 852 "lex.vsl.c"

      if ( vsl_init )
            {
            vsl_init = 0;

#ifdef YY_USER_INIT
            YY_USER_INIT;
#endif

            if ( ! vsl_start )
                  vsl_start = 1;    /* first start state */

            if ( ! vslin )
                  vslin = stdin;

            if ( ! vslout )
                  vslout = stdout;

            if ( ! vsl_current_buffer )
                  vsl_current_buffer =
                        vsl_create_buffer( vslin, YY_BUF_SIZE );

            vsl_load_buffer_state();
            }

      while ( 1 )       /* loops until end-of-file is reached */
            {
            vsl_cp = vsl_c_buf_p;

            /* Support of vsltext. */
            *vsl_cp = vsl_hold_char;

            /* vsl_bp points to the position in vsl_ch_buf of the start of
             * the current run.
             */
            vsl_bp = vsl_cp;

            vsl_current_state = vsl_start;
            vsl_current_state += YY_AT_BOL();
vsl_match:
            do
                  {
                  register YY_CHAR vsl_c = vsl_ec[YY_SC_TO_UI(*vsl_cp)];
                  if ( vsl_accept[vsl_current_state] )
                        {
                        vsl_last_accepting_state = vsl_current_state;
                        vsl_last_accepting_cpos = vsl_cp;
                        }
                  while ( vsl_chk[vsl_base[vsl_current_state] + vsl_c] != vsl_current_state )
                        {
                        vsl_current_state = (int) vsl_def[vsl_current_state];
                        if ( vsl_current_state >= 149 )
                              vsl_c = vsl_meta[(unsigned int) vsl_c];
                        }
                  vsl_current_state = vsl_nxt[vsl_base[vsl_current_state] + (unsigned int) vsl_c];
                  ++vsl_cp;
                  }
            while ( vsl_base[vsl_current_state] != 192 );

vsl_find_action:
            vsl_act = vsl_accept[vsl_current_state];
            if ( vsl_act == 0 )
                  { /* have to back up */
                  vsl_cp = vsl_last_accepting_cpos;
                  vsl_current_state = vsl_last_accepting_state;
                  vsl_act = vsl_accept[vsl_current_state];
                  }

            YY_DO_BEFORE_ACTION;


do_action:  /* This label is used only to access EOF actions. */


            switch ( vsl_act )
      { /* beginning of action switch */
                  case 0: /* must back up */
                  /* undo the effects of YY_DO_BEFORE_ACTION */
                  *vsl_cp = vsl_hold_char;
                  vsl_cp = vsl_last_accepting_cpos;
                  vsl_current_state = vsl_last_accepting_state;
                  goto vsl_find_action;

case 1:
YY_RULE_SETUP
#line 249 "./vsl-lex.L"
return VSL_STRING;            // string
      YY_BREAK
case 2:
YY_RULE_SETUP
#line 251 "./vsl-lex.L"
BREAK                   // C++ comment
      YY_BREAK
case 3:
YY_RULE_SETUP
#line 252 "./vsl-lex.L"
{                       // C comment
                  // aus `man lex`
                  loop:
                  while (vslinput() != '*');
                  switch (vslinput())
                        {
                        case '/': break;
                        case '*': unput('*');
                        default : goto loop;
                        }
                  BREAK
            }
      YY_BREAK
case 4:
YY_RULE_SETUP
#line 264 "./vsl-lex.L"
BREAK             // Unix exec() tag
      YY_BREAK
case 5:
YY_RULE_SETUP
#line 266 "./vsl-lex.L"
{                 // #include "..."
                  char buf[BUFSIZ];
                  strcpy(buf, (char *)vsltext);
                  char *start = buf;
                  while (*start != '\"') 
                        start++;
                  char *end = ++start;
                  while (*end != '\"') 
                        end++;
                  *end = '\0';
                  switchup(start, true);
                  BREAK
            }
      YY_BREAK
case 6:
YY_RULE_SETUP
#line 279 "./vsl-lex.L"
{                 // #include <...>
                  char buf[BUFSIZ];
                  strcpy(buf, (char *)vsltext);
                  char *start = buf;
                  while (*start != '<') 
                        start++;
                  char *end = ++start;
                  while (*end != '>') 
                        end++;
                  *end = '\0';
                  switchup(start, false);
                  BREAK
            }
      YY_BREAK
case 7:
YY_RULE_SETUP
#line 292 "./vsl-lex.L"
{                 // #line LINE ["FILE"]
                  string buf((char *)vsltext);
                  buf = buf.after("line");
                  char *s = CONST_CAST(char *,buf.chars());
                  int line = strtol(s, &s, 10);
                  if (s == buf.chars())
                      VSLLib::parse_error("illegal #line number");
                  else
                      vsllinenumber = line;

                  buf = buf.after('"');
                  if (!buf.empty())
                  {
                      buf = buf.before('"');
                      if (buf == "")
                        VSLLib::parse_error("illegal #line file");
                      else
                        vslfilename = uncook(buf);
                  }
                  BREAK
            }
      YY_BREAK
case 8:
YY_RULE_SETUP
#line 314 "./vsl-lex.L"
return OVERRIDE;        // Other manipulators
      YY_BREAK
case 9:
YY_RULE_SETUP
#line 315 "./vsl-lex.L"
return OVERRIDE;
      YY_BREAK
case 10:
YY_RULE_SETUP
#line 316 "./vsl-lex.L"
return REPLACE;
      YY_BREAK
case 11:
YY_RULE_SETUP
#line 317 "./vsl-lex.L"
return OVERRIDE;  // Other manipulators
      YY_BREAK
case 12:
YY_RULE_SETUP
#line 318 "./vsl-lex.L"
return OVERRIDE;
      YY_BREAK
case 13:
YY_RULE_SETUP
#line 319 "./vsl-lex.L"
return REPLACE;
      YY_BREAK
case 14:
YY_RULE_SETUP
#line 321 "./vsl-lex.L"
return IF;              // Tokens
      YY_BREAK
case 15:
YY_RULE_SETUP
#line 322 "./vsl-lex.L"
return THEN;
      YY_BREAK
case 16:
YY_RULE_SETUP
#line 323 "./vsl-lex.L"
return ELSE;
      YY_BREAK
case 17:
YY_RULE_SETUP
#line 324 "./vsl-lex.L"
return ELSIF;
      YY_BREAK
case 18:
YY_RULE_SETUP
#line 325 "./vsl-lex.L"
return FI;
      YY_BREAK
case 19:
YY_RULE_SETUP
#line 326 "./vsl-lex.L"
return OR;
      YY_BREAK
case 20:
YY_RULE_SETUP
#line 327 "./vsl-lex.L"
return AND;
      YY_BREAK
case 21:
YY_RULE_SETUP
#line 328 "./vsl-lex.L"
return NOT;
      YY_BREAK
case 22:
YY_RULE_SETUP
#line 329 "./vsl-lex.L"
return LET;
      YY_BREAK
case 23:
YY_RULE_SETUP
#line 330 "./vsl-lex.L"
return IN;
      YY_BREAK
case 24:
YY_RULE_SETUP
#line 331 "./vsl-lex.L"
return WHERE;
      YY_BREAK
case 25:
YY_RULE_SETUP
#line 332 "./vsl-lex.L"
return IDENTIFIER;
      YY_BREAK
case 26:
YY_RULE_SETUP
#line 334 "./vsl-lex.L"
return ARROW;
      YY_BREAK
case 27:
YY_RULE_SETUP
#line 335 "./vsl-lex.L"
return CONS;
      YY_BREAK
case 28:
YY_RULE_SETUP
#line 336 "./vsl-lex.L"
return APPEND;
      YY_BREAK
case 29:
YY_RULE_SETUP
#line 337 "./vsl-lex.L"
return HALIGN;
      YY_BREAK
case 30:
YY_RULE_SETUP
#line 338 "./vsl-lex.L"
return VALIGN;
      YY_BREAK
case 31:
YY_RULE_SETUP
#line 339 "./vsl-lex.L"
return UALIGN;
      YY_BREAK
case 32:
YY_RULE_SETUP
#line 340 "./vsl-lex.L"
return TALIGN;
      YY_BREAK
case 33:
YY_RULE_SETUP
#line 341 "./vsl-lex.L"
return EQ;
      YY_BREAK
case 34:
YY_RULE_SETUP
#line 342 "./vsl-lex.L"
return NE;
      YY_BREAK
case 35:
YY_RULE_SETUP
#line 343 "./vsl-lex.L"
return GT;
      YY_BREAK
case 36:
YY_RULE_SETUP
#line 344 "./vsl-lex.L"
return GE;
      YY_BREAK
case 37:
YY_RULE_SETUP
#line 345 "./vsl-lex.L"
return LT;
      YY_BREAK
case 38:
YY_RULE_SETUP
#line 346 "./vsl-lex.L"
return LE;
      YY_BREAK
case 39:
YY_RULE_SETUP
#line 348 "./vsl-lex.L"
return THREEDOTS;
      YY_BREAK
case 40:
YY_RULE_SETUP
#line 350 "./vsl-lex.L"
return INTEGER;
      YY_BREAK
case 41:
YY_RULE_SETUP
#line 352 "./vsl-lex.L"
BREAK                   // Whitespace (ignore)
      YY_BREAK
case 42:
YY_RULE_SETUP
#line 353 "./vsl-lex.L"
BREAK                   // Likewise
      YY_BREAK
case 43:
YY_RULE_SETUP
#line 354 "./vsl-lex.L"
return vsltext[0];            // All other characters
      YY_BREAK
case 44:
YY_RULE_SETUP
#line 355 "./vsl-lex.L"
ECHO;
      YY_BREAK
#line 1211 "lex.vsl.c"
case YY_STATE_EOF(INITIAL):
      vslterminate();

      case YY_END_OF_BUFFER:
            {
            /* Amount of text matched not including the EOB char. */
            int vsl_amount_of_matched_text = (int) (vsl_cp - vsltext_ptr) - 1;

            /* Undo the effects of YY_DO_BEFORE_ACTION. */
            *vsl_cp = vsl_hold_char;
            YY_RESTORE_YY_MORE_OFFSET

            if ( vsl_current_buffer->vsl_buffer_status == YY_BUFFER_NEW )
                  {
                  /* We're scanning a new file or input source.  It's
                   * possible that this happened because the user
                   * just pointed vslin at a new source and called
                   * vsllex().  If so, then we have to assure
                   * consistency between vsl_current_buffer and our
                   * globals.  Here is the right place to do so, because
                   * this is the first action (other than possibly a
                   * back-up) that will match for the new input source.
                   */
                  vsl_n_chars = vsl_current_buffer->vsl_n_chars;
                  vsl_current_buffer->vsl_input_file = vslin;
                  vsl_current_buffer->vsl_buffer_status = YY_BUFFER_NORMAL;
                  }

            /* Note that here we test for vsl_c_buf_p "<=" to the position
             * of the first EOB in the buffer, since vsl_c_buf_p will
             * already have been incremented past the NUL character
             * (since all states make transitions on EOB to the
             * end-of-buffer state).  Contrast this with the test
             * in input().
             */
            if ( vsl_c_buf_p <= &vsl_current_buffer->vsl_ch_buf[vsl_n_chars] )
                  { /* This was really a NUL. */
                  vsl_state_type vsl_next_state;

                  vsl_c_buf_p = vsltext_ptr + vsl_amount_of_matched_text;

                  vsl_current_state = vsl_get_previous_state();

                  /* Okay, we're now positioned to make the NUL
                   * transition.  We couldn't have
                   * vsl_get_previous_state() go ahead and do it
                   * for us because it doesn't know how to deal
                   * with the possibility of jamming (and we don't
                   * want to build jamming into it because then it
                   * will run more slowly).
                   */

                  vsl_next_state = vsl_try_NUL_trans( vsl_current_state );

                  vsl_bp = vsltext_ptr + YY_MORE_ADJ;

                  if ( vsl_next_state )
                        {
                        /* Consume the NUL. */
                        vsl_cp = ++vsl_c_buf_p;
                        vsl_current_state = vsl_next_state;
                        goto vsl_match;
                        }

                  else
                        {
                        vsl_cp = vsl_c_buf_p;
                        goto vsl_find_action;
                        }
                  }

            else switch ( vsl_get_next_buffer() )
                  {
                  case EOB_ACT_END_OF_FILE:
                        {
                        vsl_did_buffer_switch_on_eof = 0;

                        if ( vslwrap() )
                              {
                              /* Note: because we've taken care in
                               * vsl_get_next_buffer() to have set up
                               * vsltext, we can now set up
                               * vsl_c_buf_p so that if some total
                               * hoser (like flex itself) wants to
                               * call the scanner after we return the
                               * YY_NULL, it'll still work - another
                               * YY_NULL will get returned.
                               */
                              vsl_c_buf_p = vsltext_ptr + YY_MORE_ADJ;

                              vsl_act = YY_STATE_EOF(YY_START);
                              goto do_action;
                              }

                        else
                              {
                              if ( ! vsl_did_buffer_switch_on_eof )
                                    YY_NEW_FILE;
                              }
                        break;
                        }

                  case EOB_ACT_CONTINUE_SCAN:
                        vsl_c_buf_p =
                              vsltext_ptr + vsl_amount_of_matched_text;

                        vsl_current_state = vsl_get_previous_state();

                        vsl_cp = vsl_c_buf_p;
                        vsl_bp = vsltext_ptr + YY_MORE_ADJ;
                        goto vsl_match;

                  case EOB_ACT_LAST_MATCH:
                        vsl_c_buf_p =
                        &vsl_current_buffer->vsl_ch_buf[vsl_n_chars];

                        vsl_current_state = vsl_get_previous_state();

                        vsl_cp = vsl_c_buf_p;
                        vsl_bp = vsltext_ptr + YY_MORE_ADJ;
                        goto vsl_find_action;
                  }
            break;
            }

      default:
            YY_FATAL_ERROR(
                  "fatal flex scanner internal error--no action found" );
      } /* end of action switch */
            } /* end of scanning one token */
      } /* end of vsllex */


/* vsl_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *    EOB_ACT_LAST_MATCH -
 *    EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *    EOB_ACT_END_OF_FILE - end of file
 */

static int vsl_get_next_buffer()
      {
      register char *dest = vsl_current_buffer->vsl_ch_buf;
      register char *source = vsltext_ptr;
      register int number_to_move, i;
      int ret_val;

      if ( vsl_c_buf_p > &vsl_current_buffer->vsl_ch_buf[vsl_n_chars + 1] )
            YY_FATAL_ERROR(
            "fatal flex scanner internal error--end of buffer missed" );

      if ( vsl_current_buffer->vsl_fill_buffer == 0 )
            { /* Don't try to fill the buffer, so this is an EOF. */
            if ( vsl_c_buf_p - vsltext_ptr - YY_MORE_ADJ == 1 )
                  {
                  /* We matched a single character, the EOB, so
                   * treat this as a final EOF.
                   */
                  return EOB_ACT_END_OF_FILE;
                  }

            else
                  {
                  /* We matched some text prior to the EOB, first
                   * process it.
                   */
                  return EOB_ACT_LAST_MATCH;
                  }
            }

      /* Try to read more data. */

      /* First move last chars to start of buffer. */
      number_to_move = (int) (vsl_c_buf_p - vsltext_ptr) - 1;

      for ( i = 0; i < number_to_move; ++i )
            *(dest++) = *(source++);

      if ( vsl_current_buffer->vsl_buffer_status == YY_BUFFER_EOF_PENDING )
            /* don't do the read, it's not guaranteed to return an EOF,
             * just force an EOF
             */
            vsl_current_buffer->vsl_n_chars = vsl_n_chars = 0;

      else
            {
            int num_to_read =
                  vsl_current_buffer->vsl_buf_size - number_to_move - 1;

            while ( num_to_read <= 0 )
                  { /* Not enough room in the buffer - grow it. */
#ifdef YY_USES_REJECT
                  YY_FATAL_ERROR(
"input buffer overflow, can't enlarge buffer because scanner uses REJECT" );
#else

                  /* just a shorter name for the current buffer */
                  YY_BUFFER_STATE b = vsl_current_buffer;

                  int vsl_c_buf_p_offset =
                        (int) (vsl_c_buf_p - b->vsl_ch_buf);

                  if ( b->vsl_is_our_buffer )
                        {
                        int new_size = b->vsl_buf_size * 2;

                        if ( new_size <= 0 )
                              b->vsl_buf_size += b->vsl_buf_size / 8;
                        else
                              b->vsl_buf_size *= 2;

                        b->vsl_ch_buf = (char *)
                              /* Include room in for 2 EOB chars. */
                              vsl_flex_realloc( (void *) b->vsl_ch_buf,
                                           b->vsl_buf_size + 2 );
                        }
                  else
                        /* Can't grow it, we don't own it. */
                        b->vsl_ch_buf = 0;

                  if ( ! b->vsl_ch_buf )
                        YY_FATAL_ERROR(
                        "fatal error - scanner input buffer overflow" );

                  vsl_c_buf_p = &b->vsl_ch_buf[vsl_c_buf_p_offset];

                  num_to_read = vsl_current_buffer->vsl_buf_size -
                                    number_to_move - 1;
#endif
                  }

            if ( num_to_read > YY_READ_BUF_SIZE )
                  num_to_read = YY_READ_BUF_SIZE;

            /* Read in more data. */
            YY_INPUT( (&vsl_current_buffer->vsl_ch_buf[number_to_move]),
                  vsl_n_chars, num_to_read );

            vsl_current_buffer->vsl_n_chars = vsl_n_chars;
            }

      if ( vsl_n_chars == 0 )
            {
            if ( number_to_move == YY_MORE_ADJ )
                  {
                  ret_val = EOB_ACT_END_OF_FILE;
                  vslrestart( vslin );
                  }

            else
                  {
                  ret_val = EOB_ACT_LAST_MATCH;
                  vsl_current_buffer->vsl_buffer_status =
                        YY_BUFFER_EOF_PENDING;
                  }
            }

      else
            ret_val = EOB_ACT_CONTINUE_SCAN;

      vsl_n_chars += number_to_move;
      vsl_current_buffer->vsl_ch_buf[vsl_n_chars] = YY_END_OF_BUFFER_CHAR;
      vsl_current_buffer->vsl_ch_buf[vsl_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

      vsltext_ptr = &vsl_current_buffer->vsl_ch_buf[0];

      return ret_val;
      }


/* vsl_get_previous_state - get the state just before the EOB char was reached */

static vsl_state_type vsl_get_previous_state()
      {
      register vsl_state_type vsl_current_state;
      register char *vsl_cp;

      vsl_current_state = vsl_start;
      vsl_current_state += YY_AT_BOL();

      for ( vsl_cp = vsltext_ptr + YY_MORE_ADJ; vsl_cp < vsl_c_buf_p; ++vsl_cp )
            {
            register YY_CHAR vsl_c = (*vsl_cp ? vsl_ec[YY_SC_TO_UI(*vsl_cp)] : 1);
            if ( vsl_accept[vsl_current_state] )
                  {
                  vsl_last_accepting_state = vsl_current_state;
                  vsl_last_accepting_cpos = vsl_cp;
                  }
            while ( vsl_chk[vsl_base[vsl_current_state] + vsl_c] != vsl_current_state )
                  {
                  vsl_current_state = (int) vsl_def[vsl_current_state];
                  if ( vsl_current_state >= 149 )
                        vsl_c = vsl_meta[(unsigned int) vsl_c];
                  }
            vsl_current_state = vsl_nxt[vsl_base[vsl_current_state] + (unsigned int) vsl_c];
            }

      return vsl_current_state;
      }


/* vsl_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *    next_state = vsl_try_NUL_trans( current_state );
 */

#ifdef YY_USE_PROTOS
static vsl_state_type vsl_try_NUL_trans( vsl_state_type vsl_current_state )
#else
static vsl_state_type vsl_try_NUL_trans( vsl_current_state )
vsl_state_type vsl_current_state;
#endif
      {
      register int vsl_is_jam;
      register char *vsl_cp = vsl_c_buf_p;

      register YY_CHAR vsl_c = 1;
      if ( vsl_accept[vsl_current_state] )
            {
            vsl_last_accepting_state = vsl_current_state;
            vsl_last_accepting_cpos = vsl_cp;
            }
      while ( vsl_chk[vsl_base[vsl_current_state] + vsl_c] != vsl_current_state )
            {
            vsl_current_state = (int) vsl_def[vsl_current_state];
            if ( vsl_current_state >= 149 )
                  vsl_c = vsl_meta[(unsigned int) vsl_c];
            }
      vsl_current_state = vsl_nxt[vsl_base[vsl_current_state] + (unsigned int) vsl_c];
      vsl_is_jam = (vsl_current_state == 148);

      return vsl_is_jam ? 0 : vsl_current_state;
      }


#ifndef YY_NO_UNPUT
#ifdef YY_USE_PROTOS
static void vslunput( int c, register char *vsl_bp )
#else
static void vslunput( c, vsl_bp )
int c;
register char *vsl_bp;
#endif
      {
      register char *vsl_cp = vsl_c_buf_p;

      /* undo effects of setting up vsltext */
      *vsl_cp = vsl_hold_char;

      if ( vsl_cp < vsl_current_buffer->vsl_ch_buf + 2 )
            { /* need to shift things up to make room */
            /* +2 for EOB chars. */
            register int number_to_move = vsl_n_chars + 2;
            register char *dest = &vsl_current_buffer->vsl_ch_buf[
                              vsl_current_buffer->vsl_buf_size + 2];
            register char *source =
                        &vsl_current_buffer->vsl_ch_buf[number_to_move];

            while ( source > vsl_current_buffer->vsl_ch_buf )
                  *--dest = *--source;

            vsl_cp += (int) (dest - source);
            vsl_bp += (int) (dest - source);
            vsl_current_buffer->vsl_n_chars =
                  vsl_n_chars = vsl_current_buffer->vsl_buf_size;

            if ( vsl_cp < vsl_current_buffer->vsl_ch_buf + 2 )
                  YY_FATAL_ERROR( "flex scanner push-back overflow" );
            }

      *--vsl_cp = (char) c;


      vsltext_ptr = vsl_bp;
      vsl_hold_char = *vsl_cp;
      vsl_c_buf_p = vsl_cp;
      }
#endif      /* ifndef YY_NO_UNPUT */


#ifndef YY_NO_INPUT
#ifdef __cplusplus
static int vslinput()
#else
static int input()
#endif
      {
      int c;

      *vsl_c_buf_p = vsl_hold_char;

      if ( *vsl_c_buf_p == YY_END_OF_BUFFER_CHAR )
            {
            /* vsl_c_buf_p now points to the character we want to return.
             * If this occurs *before* the EOB characters, then it's a
             * valid NUL; if not, then we've hit the end of the buffer.
             */
            if ( vsl_c_buf_p < &vsl_current_buffer->vsl_ch_buf[vsl_n_chars] )
                  /* This was really a NUL. */
                  *vsl_c_buf_p = '\0';

            else
                  { /* need more input */
                  int offset = vsl_c_buf_p - vsltext_ptr;
                  ++vsl_c_buf_p;

                  switch ( vsl_get_next_buffer() )
                        {
                        case EOB_ACT_LAST_MATCH:
                              /* This happens because vsl_g_n_b()
                               * sees that we've accumulated a
                               * token and flags that we need to
                               * try matching the token before
                               * proceeding.  But for input(),
                               * there's no matching to consider.
                               * So convert the EOB_ACT_LAST_MATCH
                               * to EOB_ACT_END_OF_FILE.
                               */

                              /* Reset buffer status. */
                              vslrestart( vslin );

                              /* fall through */

                        case EOB_ACT_END_OF_FILE:
                              {
                              if ( vslwrap() )
                                    return EOF;

                              if ( ! vsl_did_buffer_switch_on_eof )
                                    YY_NEW_FILE;
#ifdef __cplusplus
                              return vslinput();
#else
                              return input();
#endif
                              }

                        case EOB_ACT_CONTINUE_SCAN:
                              vsl_c_buf_p = vsltext_ptr + offset;
                              break;
                        }
                  }
            }

      c = *(unsigned char *) vsl_c_buf_p; /* cast for 8-bit char's */
      *vsl_c_buf_p = '\0';    /* preserve vsltext */
      vsl_hold_char = *++vsl_c_buf_p;

      vsl_current_buffer->vsl_at_bol = (c == '\n');

      return c;
      }
#endif /* YY_NO_INPUT */

#ifdef YY_USE_PROTOS
void vslrestart( FILE *input_file )
#else
void vslrestart( input_file )
FILE *input_file;
#endif
      {
      if ( ! vsl_current_buffer )
            vsl_current_buffer = vsl_create_buffer( vslin, YY_BUF_SIZE );

      vsl_init_buffer( vsl_current_buffer, input_file );
      vsl_load_buffer_state();
      }


#ifdef YY_USE_PROTOS
void vsl_switch_to_buffer( YY_BUFFER_STATE new_buffer )
#else
void vsl_switch_to_buffer( new_buffer )
YY_BUFFER_STATE new_buffer;
#endif
      {
      if ( vsl_current_buffer == new_buffer )
            return;

      if ( vsl_current_buffer )
            {
            /* Flush out information for old buffer. */
            *vsl_c_buf_p = vsl_hold_char;
            vsl_current_buffer->vsl_buf_pos = vsl_c_buf_p;
            vsl_current_buffer->vsl_n_chars = vsl_n_chars;
            }

      vsl_current_buffer = new_buffer;
      vsl_load_buffer_state();

      /* We don't actually know whether we did this switch during
       * EOF (vslwrap()) processing, but the only time this flag
       * is looked at is after vslwrap() is called, so it's safe
       * to go ahead and always set it.
       */
      vsl_did_buffer_switch_on_eof = 1;
      }


#ifdef YY_USE_PROTOS
void vsl_load_buffer_state( void )
#else
void vsl_load_buffer_state()
#endif
      {
      vsl_n_chars = vsl_current_buffer->vsl_n_chars;
      vsltext_ptr = vsl_c_buf_p = vsl_current_buffer->vsl_buf_pos;
      vslin = vsl_current_buffer->vsl_input_file;
      vsl_hold_char = *vsl_c_buf_p;
      }


#ifdef YY_USE_PROTOS
YY_BUFFER_STATE vsl_create_buffer( FILE *file, int size )
#else
YY_BUFFER_STATE vsl_create_buffer( file, size )
FILE *file;
int size;
#endif
      {
      YY_BUFFER_STATE b;

      b = (YY_BUFFER_STATE) vsl_flex_alloc( sizeof( struct vsl_buffer_state ) );
      if ( ! b )
            YY_FATAL_ERROR( "out of dynamic memory in vsl_create_buffer()" );

      b->vsl_buf_size = size;

      /* vsl_ch_buf has to be 2 characters longer than the size given because
       * we need to put in 2 end-of-buffer characters.
       */
      b->vsl_ch_buf = (char *) vsl_flex_alloc( b->vsl_buf_size + 2 );
      if ( ! b->vsl_ch_buf )
            YY_FATAL_ERROR( "out of dynamic memory in vsl_create_buffer()" );

      b->vsl_is_our_buffer = 1;

      vsl_init_buffer( b, file );

      return b;
      }


#ifdef YY_USE_PROTOS
void vsl_delete_buffer( YY_BUFFER_STATE b )
#else
void vsl_delete_buffer( b )
YY_BUFFER_STATE b;
#endif
      {
      if ( ! b )
            return;

      if ( b == vsl_current_buffer )
            vsl_current_buffer = (YY_BUFFER_STATE) 0;

      if ( b->vsl_is_our_buffer )
            vsl_flex_free( (void *) b->vsl_ch_buf );

      vsl_flex_free( (void *) b );
      }



#ifdef YY_USE_PROTOS
void vsl_init_buffer( YY_BUFFER_STATE b, FILE *file )
#else
void vsl_init_buffer( b, file )
YY_BUFFER_STATE b;
FILE *file;
#endif


      {
      vsl_flush_buffer( b );

      b->vsl_input_file = file;
      b->vsl_fill_buffer = 1;

#if YY_ALWAYS_INTERACTIVE
      b->vsl_is_interactive = 1;
#else
#if YY_NEVER_INTERACTIVE
      b->vsl_is_interactive = 0;
#else
      b->vsl_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0;
#endif
#endif
      }


#ifdef YY_USE_PROTOS
void vsl_flush_buffer( YY_BUFFER_STATE b )
#else
void vsl_flush_buffer( b )
YY_BUFFER_STATE b;
#endif

      {
      if ( ! b )
            return;

      b->vsl_n_chars = 0;

      /* We always need two end-of-buffer characters.  The first causes
       * a transition to the end-of-buffer state.  The second causes
       * a jam in that state.
       */
      b->vsl_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
      b->vsl_ch_buf[1] = YY_END_OF_BUFFER_CHAR;

      b->vsl_buf_pos = &b->vsl_ch_buf[0];

      b->vsl_at_bol = 1;
      b->vsl_buffer_status = YY_BUFFER_NEW;

      if ( b == vsl_current_buffer )
            vsl_load_buffer_state();
      }


#ifndef YY_NO_SCAN_BUFFER
#ifdef YY_USE_PROTOS
YY_BUFFER_STATE vsl_scan_buffer( char *base, vsl_size_t size )
#else
YY_BUFFER_STATE vsl_scan_buffer( base, size )
char *base;
vsl_size_t size;
#endif
      {
      YY_BUFFER_STATE b;

      if ( size < 2 ||
           base[size-2] != YY_END_OF_BUFFER_CHAR ||
           base[size-1] != YY_END_OF_BUFFER_CHAR )
            /* They forgot to leave room for the EOB's. */
            return 0;

      b = (YY_BUFFER_STATE) vsl_flex_alloc( sizeof( struct vsl_buffer_state ) );
      if ( ! b )
            YY_FATAL_ERROR( "out of dynamic memory in vsl_scan_buffer()" );

      b->vsl_buf_size = size - 2;   /* "- 2" to take care of EOB's */
      b->vsl_buf_pos = b->vsl_ch_buf = base;
      b->vsl_is_our_buffer = 0;
      b->vsl_input_file = 0;
      b->vsl_n_chars = b->vsl_buf_size;
      b->vsl_is_interactive = 0;
      b->vsl_at_bol = 1;
      b->vsl_fill_buffer = 0;
      b->vsl_buffer_status = YY_BUFFER_NEW;

      vsl_switch_to_buffer( b );

      return b;
      }
#endif


#ifndef YY_NO_SCAN_STRING
#ifdef YY_USE_PROTOS
YY_BUFFER_STATE vsl_scan_string( vslconst char *vsl_str )
#else
YY_BUFFER_STATE vsl_scan_string( vsl_str )
vslconst char *vsl_str;
#endif
      {
      int len;
      for ( len = 0; vsl_str[len]; ++len )
            ;

      return vsl_scan_bytes( vsl_str, len );
      }
#endif


#ifndef YY_NO_SCAN_BYTES
#ifdef YY_USE_PROTOS
YY_BUFFER_STATE vsl_scan_bytes( vslconst char *bytes, int len )
#else
YY_BUFFER_STATE vsl_scan_bytes( bytes, len )
vslconst char *bytes;
int len;
#endif
      {
      YY_BUFFER_STATE b;
      char *buf;
      vsl_size_t n;
      int i;

      /* Get memory for full buffer, including space for trailing EOB's. */
      n = len + 2;
      buf = (char *) vsl_flex_alloc( n );
      if ( ! buf )
            YY_FATAL_ERROR( "out of dynamic memory in vsl_scan_bytes()" );

      for ( i = 0; i < len; ++i )
            buf[i] = bytes[i];

      buf[len] = buf[len+1] = YY_END_OF_BUFFER_CHAR;

      b = vsl_scan_buffer( buf, n );
      if ( ! b )
            YY_FATAL_ERROR( "bad buffer in vsl_scan_bytes()" );

      /* It's okay to grow etc. this buffer, and we should throw it
       * away when we're done.
       */
      b->vsl_is_our_buffer = 1;

      return b;
      }
#endif


#ifndef YY_NO_PUSH_STATE
#ifdef YY_USE_PROTOS
static void vsl_push_state( int new_state )
#else
static void vsl_push_state( new_state )
int new_state;
#endif
      {
      if ( vsl_start_stack_ptr >= vsl_start_stack_depth )
            {
            vsl_size_t new_size;

            vsl_start_stack_depth += YY_START_STACK_INCR;
            new_size = vsl_start_stack_depth * sizeof( int );

            if ( ! vsl_start_stack )
                  vsl_start_stack = (int *) vsl_flex_alloc( new_size );

            else
                  vsl_start_stack = (int *) vsl_flex_realloc(
                              (void *) vsl_start_stack, new_size );

            if ( ! vsl_start_stack )
                  YY_FATAL_ERROR(
                  "out of memory expanding start-condition stack" );
            }

      vsl_start_stack[vsl_start_stack_ptr++] = YY_START;

      BEGIN(new_state);
      }
#endif


#ifndef YY_NO_POP_STATE
static void vsl_pop_state()
      {
      if ( --vsl_start_stack_ptr < 0 )
            YY_FATAL_ERROR( "start-condition stack underflow" );

      BEGIN(vsl_start_stack[vsl_start_stack_ptr]);
      }
#endif


#ifndef YY_NO_TOP_STATE
static int vsl_top_state()
      {
      return vsl_start_stack[vsl_start_stack_ptr - 1];
      }
#endif

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif

#ifdef YY_USE_PROTOS
static void vsl_fatal_error( vslconst char msg[] )
#else
static void vsl_fatal_error( msg )
char msg[];
#endif
      {
      (void) fprintf( stderr, "%s\n", msg );
      exit( YY_EXIT_FAILURE );
      }



/* Redefine vslless() so it works in section 3 code. */

#undef vslless
#define vslless(n) \
      do \
            { \
            /* Undo effects of setting up vsltext. */ \
            vsltext[vslleng] = vsl_hold_char; \
            vsl_c_buf_p = vsltext + n; \
            vsl_hold_char = *vsl_c_buf_p; \
            *vsl_c_buf_p = '\0'; \
            vslleng = n; \
            } \
      while ( 0 )


/* Internal utility routines. */

#ifndef vsltext_ptr
#ifdef YY_USE_PROTOS
static void vsl_flex_strncpy( char *s1, vslconst char *s2, int n )
#else
static void vsl_flex_strncpy( s1, s2, n )
char *s1;
vslconst char *s2;
int n;
#endif
      {
      register int i;
      for ( i = 0; i < n; ++i )
            s1[i] = s2[i];
      }
#endif

#ifdef YY_NEED_STRLEN
#ifdef YY_USE_PROTOS
static int vsl_flex_strlen( vslconst char *s )
#else
static int vsl_flex_strlen( s )
vslconst char *s;
#endif
      {
      register int n;
      for ( n = 0; s[n]; ++n )
            ;

      return n;
      }
#endif


#ifdef YY_USE_PROTOS
static void *vsl_flex_alloc( vsl_size_t size )
#else
static void *vsl_flex_alloc( size )
vsl_size_t size;
#endif
      {
      return (void *) malloc( size );
      }

#ifdef YY_USE_PROTOS
static void *vsl_flex_realloc( void *ptr, vsl_size_t size )
#else
static void *vsl_flex_realloc( ptr, size )
void *ptr;
vsl_size_t size;
#endif
      {
      /* The cast to (char *) in the following accommodates both
       * implementations that use char* generic pointers, and those
       * that use void* generic pointers.  It works with the latter
       * because both ANSI C and C++ allow castless assignment from
       * any pointer type to void*, and deal with argument conversions
       * as though doing an assignment.
       */
      return (void *) realloc( (char *) ptr, size );
      }

#ifdef YY_USE_PROTOS
static void vsl_flex_free( void *ptr )
#else
static void vsl_flex_free( ptr )
void *ptr;
#endif
      {
      free( ptr );
      }

#if YY_MAIN
int main()
      {
      vsllex();
      return 0;
      }
#endif
#line 355 "./vsl-lex.L"

// Delete name set
void vslNameSet::reset()
{ 
    if (_next) 
      delete _next; 
    _next = 0; 
}

// Add to name set; if already there, return -1
int vslNameSet::add(const char *name)
{
    if (strcmp(_name.chars(), name) == 0)
      return -1;

    if (_next)
      return _next->add(name);

    _next = new vslNameSet(name);
    return 0;
}

// Clear name set
static void switchreset()
{
    vslnameSet.reset();
}


// Return to original file
static int switchdown(void) 
{
    if (topstack <= 0)
      return -1;
      
    if (vslstream != 0)
    {
      if (VSEFlags::verbose)
      {
          std::cout << ")";
          std::cout.flush();
      }
      delete vslstream;
    }

    topstack--;
    vslstream      = streamstack[topstack];
    vslfilename    = namestack[topstack];
    vsllinenumber = linestack[topstack];

#ifdef FLEX_SCANNER
    if (YY_CURRENT_BUFFER != 0)
      vsl_delete_buffer(YY_CURRENT_BUFFER);
    vsl_switch_to_buffer(bufstack[topstack]);
#endif

    return 0;
}

#ifndef VSL_INCLUDE_PATH
#define VSL_INCLUDE_PATH "/usr/local/lib/vsl-include"
#endif

static string dirname(const string& file)
{
    if (file.contains('/'))
      return file.before('/', -1);
    else
      return ".";
}

// Search file in directories -I, $VSL_INCLUDE.
// If THISDIR == true, also search in current directory,
// If not found, return FILENAME.
static const char *searchpath(const char *filename, bool thisDir)
{
    char includeList[BUFSIZ];

    // If "-I" is given, use this path
    const char *s = VSEFlags::include_search_path;
    if (s == 0 || s[0] == '\0')
    {
      // Otherwise: Use environment or default path
      s = getenv("VSL_INCLUDE");
      if (s == 0)
      {
          static string path = 
            string(VSL_INCLUDE_PATH) +
            ":/usr/local/vse/vsl-include"
            ":/usr/vse/vsl-include"
            ":/usr/local/lib/vse/vsl-include"
            ":/usr/lib/vse/vsl-include"
            ":/usr/local/lib/vsl-include"
            ":/usr/lib/vsl-include";
          
          s = path.chars();
      }
    }

    // If this dir to be searched, prepend directory name of current file.
    if (thisDir)
    {
      string dir = dirname(vslfilename);
      dir += ":";
      strcpy(includeList, dir.chars());
    }
    else
    {
      strcpy(includeList, "");
    }
    strncat(includeList, s, BUFSIZ - 2);

    // Check dirs; if file can be opened, return full path
    for (char *p = strtok(includeList, ":"); 
       p != 0; 
       p = strtok((char *)0, ":"))
    {
      static char path[BUFSIZ];
      strcpy(path, p);
      strcat(path, "/");
      strcat(path, filename);

      FILE *fp = fopen(path, "r");
      if (fp != 0 && fclose(fp) != EOF)
      {
          // Remove "./" prefix
          if (path[0] == '.' && path[1] == '/')
            return path + 2;
          else
            return path;
      }
    }

    return filename;
}

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